Portable convection oven



FIG. 1 is a front perspective view of a portable convection oven showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a left side elevational view thereof, the right side being a mirror image; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a portable convection oven, as shown and described. 